I have done L-100s, 65s, 150s, 4312, even 212s this way. Install a router upside under a table or buy a router table. Use a 1/8 inch straight bit. Put a fence about 3/8 in on back of grill and router a groove all the way around about 3/16 deep. It is very easy to do. Buy a pack of 1/8 inch screen spline at the hardware store and the roller installer tool. I install the spline on opposite sides then pull it back from the corner and re-pull the cloth back and re-install. Easy and perfect every time. Easy to pull the spline out and install new cloth. Never a wrinkle. I cut the excess with a razor blade. The groover is tighter and works better in MDF I have made but it also works on the JBL particle board. You will never touch glue again.